Pen.



PATENTED AUG. 18, 1908.

G. RENTZ.

PEN. APPLICATION FILED JUNE 18, 1907.

7 Q yavk Svwewfoz attmwwg GEORGE RENTZ, OF WELLS, MINNESOTA.

PEN.

Specification of Letters Patent.

Patented Aug. 18, 1908.

Application filed June 18, 1907. Serial No. 379,571.

To all whom it may concern:

Be it known that I, GEORGE RENTZ, a citizen of the United States,residing at Wells, in the county of Faribault, State of Minnesota, haveinvented certain new and useful Improvements in Pens; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to self-filling pens and has for its object toprovide in a pen of this class, a novel means for locking the presserbar which serves to compress the ink containing bag under normalconditions, the means being movable to permit operation of the said bar.

One of the primary objects of the invention is to provide a pen of thisclass which will be more durable than similar pens now on the market.The means for locking the presser bar, mentioned above, is embodied in asleeve and this sleeve is guided for sliding movement upon the barrel ofthe pen and held against rotation thereon by means of a stud which isformed upon it and which projects into a groove formed in the saidbarrel. I-Ieretofore it has been customary in constructions similar tothis to fix in the hard rubber barrel of the pen a metallic pin and slotthe slidable sleeve but such a construction is undesirable inasmuch asthe barrel being of hard rubber and the pin of metal and both havingdiflerent coefllcients of expansion and contraction, the pin soon worksloose and the pen is rendered useless.

In the accompanying drawings, Figure 1 is a view in elevation of a penconstructed in accordance with my invention, Fig. 2 is a verticalsectional view therethrough, Fig. 3 is a transverse sectional view takenin a plane adjacent the push pin upon the presser bar and the lockingand releasing devices for the said pin, Fig. 4 is a detail perspectiveview of the presser bar, and, Fig. 5 is a similar view of the lockingsleeve.

As shown in the drawings the pen consists of the usual hollow handle 5into one end of which is screwed the pen section 6 carrying a pen point7 and the feed tongue 8, all of these elements being of the usualconstruction. Engaged over the inner end of the pen section 6 is anelastic ink bag 9,

the said bag being normally contained within the handle 5.. The handle 5is perforated as at 10 for the engagement therethrough of a push pin 11which is notched in opposite sides as at 12 and which carries a presserbar 13, the said bar being located within the handle 5 and beingextended along the ink ba 9.

:l tubular sleeve 14 is engaged upon the handle 5 of the pen and isaxially movable thereon and is provided with a forwardly extending slot15 which is of key-hole formation and has its reduced or minor portionof such width that when the sleeve is at the forward limit of itsmovement the edges of this slot will be engaged in the notches 12 of thepush pin. However, when the sleeve is moved rearwardly, the said edgesof the slot are caused to disengage from the notches and the pin thenextends through the enlarged or major portion of the slot and may bepressed for a purpose to be presently described, it being understoodthat it is held against being pressed when in its former position. Inorder that the sleeve may be guided in its movement upon the handle, agroove 16 is formed in the handle in a line with the slot in the sleeveand a stud 17 which is carried by the sleeve projects into the grooveand guides the sleeve as stated.

When it is desired to refill the pen, the sleeve is moved rearwardlyupon the handle until the push pin 11 is received in the enlarged ormajor portion of the key-hole slot in the sleeve and the said push pinis then pressed to force the presser bar against the bag 9 and therebycompress the same after which the pen point is dipped into an inkwelland the push pin released, the elasticity of the bag serving to restorethe pin and the presser bar to their normal position.

A head 18 is formed at the rear end of the sleeve and is provided with atransversely extending groove 19 in which the thumb or finger nail maybe engaged for the purpose of moving the sleeve.

What is claimed, is-

A fountain pen comprising a hard rubber barrel, a flexible ink baginclosed within the barrel, a presser bar engaging said ink bag,

an outwardly extending push pin on said, presser bar, a tubular metalsleeve axiallyi slidable on the barrel and having a key-hole},

slot the narrowed portion of which is adapted In testimony whereof, Iafiix my signature, to engage tfhe l{)ush pin ancll prevent aotiie inpresence of two witnesses. :tion thereo t e said barre "being providedwith a; gpivg extending in a line with the GEORGE RENTZ' 5 slot in t esleeve, and a rnetellio stndjorrned Witnesses:

integral with the metallic sleeve and extend- BYRON HUGHES,

ing into the groove. FRED. HANSEN.

